Is it mandatory to specify the alt attribute in the <img> tag?

In Java, there is no such tag <img>. This is an HTML element used to embed images into a webpage. The alt attribute in the HTML <img> tag is strongly recommended, but not strictly required in terms of HTML validation for all cases.

However, from the perspective of accessibility, search engine optimization (SEO), and proper browser functioning when images are unavailable, specifying alt is extremely important. The absence of alt or an empty alt (alt="") have different meanings and consequences.

From a development standpoint, it is important to understand the context:

• Accessibility: Screen readers use the alt text to describe images to blind or visually impaired users. Missing alt makes content inaccessible to them.
• SEO: Search engines use the alt text to understand the content of images and to index them.
• Error display: If an image fails to load, the browser displays the text from the alt attribute (except when alt="").

Conclusion: Although not always formally required for validation, the alt attribute must always be specified to ensure accessibility, SEO, and a correct user experience. Omitting alt or using alt="" should be conscious decisions based on the purpose of the image.